![]() ![]() Watch for coolant pooling under your vehicle or collecting along the bottom of your radiator. At your radiator: A cracked or corroded radiator can allow coolant to seep or stream out if the leak gets bad enough.Long before that happens, you can often detect the start of a coolant leak at these common coolant leaking locations: This is not what you want to be dealing with. When a coolant leak gets bad enough, the level of coolant in your cooling system will drop, and your engine will overheat. In fact, we are the #1 brand in the United States when it comes to solving automotive leaks without expensive hard-part physical repairs.Ĭheck out the below list of common sources of coolant leaking and be ready to take action at the first sign of a leak under your vehicle. Here at Bar’s Leaks, we have over 70 years of experience in the leak repair business and have developed award-winning products to stop many radiator and cooling system leaks. Being able to recognize and determine the cause of a coolant or antifreeze leak can help you avoid major problems. When fluid leaks out of your car and into the environment, it can cause your vehicle to run poorly or even suffer considerable damage if the leak is left unattended over time. Let’s be honest: any fluid leak in your vehicle is a problem. Transmission Stop Leak Concentrate (1420).Power Steering Stop Leak Concentrate (1630).Oil Seal Engine Oil Burning & Leak Repair (OS-1).Heavy Duty Rear Main Seal Repair (1040).Engine Oil Stop Leak Concentrate (1010).Pelletized Heavy Duty Stop Leak (PLT11).Radiator Stop Leak 2X Concentrate (1194).Block Seal Coolant Leak Fix Stop Leak (1109).Your Haynes Manual will show you how to do this. If the head gasket has failed, there is only one solution, and that's to strip the engine down and replace the gasket. There is also the option of a leak-down test which pressurises the engine (through a spark plug hole) and monitors the pressure loss. If there is any present the gasket is blown. It tests for hydrocarbons (unburnt fuel) in the coolant system. Water dripping from the exhaust manifold.Ī garage can use a gas analyser to detect a head gasket leak.Coolant bubbling or 'froth' in the header tank.Lumpy running, rough idle, poor starting.White smoke (steam) comes out of the exhaust, even when the engine is up to operating temperature.The underside of the filler cap is covered in a mayonnaise-like substance – although this is more likely to be caused by condensation if the car is only ever used on short journeys.Coolant mixed with the oil (turning it milky if there is a severe leak).If it has, it could be leaking coolant into the combustion chambers. If the car has recently overheated then this could have caused the head gasket to fail. If the coolant level is dropping and there is no external leak evident, then the coolant is probably leaking internally, into the engine. If there are no puddles beneath the vehicle, yet the coolant level is dropping, you have an internal leak, which means the coolant is leaking into the engine. If you can locate a drip on a hose, the engine block or can see a radiator leak, and there's a pool of coolant under the car, then it's an external leak. ![]() There are two kinds of coolant leaks: internal and external. Coolant leak: the difference between internal and external leaksĪ car’s coolant doesn't just evaporate into thin air when it leaks (well, not all of it, anyway). Coolant leak repair is usually straightforward – just be prepared to spend some time with your head under the bonnet, because some leaks can be tricky to locate. The level will rise when the engine is warm because water expands when it's hot, but it'll fall back to the 'cold' level when it cools. Car coolant is contained within a sealed system, so if it's in good condition the coolant level shouldn't change if it's checked when the engine is cold. If you haven't just renewed the coolant, there's a good chance there is a leak, either from the radiator or somewhere else. You might have just changed the coolant and the air locks in the system have now cleared and the coolant needs to be topped up to the correct level. ![]() There are a couple of reasons why your car's coolant level might be low, and a leak won't always be to blame. Discover which Haynes Manual is best for you. ![]()
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